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Northgate Home Page
GEOMETRY VIDEO TUTORIALS
NOTE: These videos are from textbooks previously used at Northgate. Videos from the current publisher are embedded in the
online textbook
.
Ch. 1 - Tools of Geometry
1-1 Patterns and Inductive Reasoning
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
1-2 Drawings, Nets and other Models
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
Pearson #3
1-3 Points, Lines and Planes
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
1-4 Segments, Rays, Parallel Lines and Planes
Holt #1
Pearson #1
Pearson #2
Pearson #3
1-5 Measuring Segments
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
1-6 Measuring Angles
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
Pearson #3
1-7 Basic Constructions
Holt #1
Pearson #1
Pearson #2
Pearson #3
Pearson #4
1-8 The Coordinate Plane
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
1-9 Perimeter, Circumference, and Area
Holt #1
Holt #2
Holt #3
Pearson #1
Pearson #2
Pearson #3
Pearson #4
Pearson #5
Ch. 2 - Reasoning and Proof
2-1 Conditional Statements
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
Pearson #3
2-2 Biconditionals and Definitions
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
Pearson #3
Pearson #4
2-3 Deductive Reasoning
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
2-4 Reasoning in Algebra
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
2-5 Proving Angles Congruent
Holt #1
Holt #2
Holt #3
Pearson #1
Pearson #2
Ch. 3 - Parallel and Perpendicular Lines
3-1 Properties of Parallel Lines
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Pearson #1
Pearson #2
3-2 Proving Lines Parallel
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
3-3 Parallel and Perpendicular Lines
Holt #1
Holt #2
Pearson #1
3-4 Parallel Lines and Triangle Angle sum Theorem
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Holt #6
Holt #7
Holt #8
Pearson #1
Pearson #2
Pearson #3
3-5 The Polygon Angle Sum theorems
Holt #1
Holt #2
Holt #3
Pearson #1
Pearson #2
3-6 Lines in the Coordinate Plane
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Holt #6
Holt #7
Pearson #1
Pearson #2
Pearson #3
Pearson #4
3-7 Slopes of Lines and Perpendicular Lines
Holt #1
Holt #2
Pearson #1
Pearson #2
Pearson #3
Pearson #4
3-8 Constructing Parallel and Perpendicular Lines
Pearson #1
Pearson #2
Pearson #3
Ch. 4 - Congruent Triangles
4-1 Congruent Figures
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
Pearson #3
4-2 Triangle Congruence by SSS and SAS
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
4-3 Triangle Congruence by ASA and AA
Holt #1
Holt #2
Pearson #1
Pearson #2
4-4 Using Congruent Triangles – CPCTC
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
4-5 Isosceles and Equilateral Triangles
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
4-6 Congruence in Right Triangles
Holt #1
Holt #2
Pearson #1
Pearson #2
4-7 Using Corresponding Parts of Congruent Triangles
Pearson #1
Ch. 5 - Relationships within Triangles
5-1 Midsegments in Triangles
Holt #1
Holt #2
Holt #3
Pearson #1
Pearson #2
5-2 Bisectors in Triangles
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
5-3 Concurrent Lines, Medians, and Altitudes
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Holt #6
Holt #7
Pearson #1
Pearson #2
Pearson #3
5-4 Inverses, Contrapositives and Indirect Reasoning
Holt #1
Pearson #1
5-5 Inequalities in Triangles
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
Ch. 6 – Quadrilaterals
6-1 Classifying Quadrilaterals
Holt #1
Holt #2
Pearson #1
Pearson #2
Pearson #3
6-2 Properties of Parallelograms
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
Pearson #2
6-3 Proving That a Quadrilateral is a Parallelogram
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1
6-4 Special Parallelograms
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Holt #6
Holt #7
Pearson #1
Pearson #2
6-5 Trapezoids and Kites
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Pearson #1
Pearson #2
6-6 Placing Figures in the Coordinate Plane
Holt #1
Holt #2
Pearson #1
6-7 Proofs Using Coordinate Geometry
Holt #1
Holt #2
Holt #3
Pearson #1
Ch. 7 – Similarity
7-1 Ratios and Proportions
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Pearson #1: Solving Proportions
7-2 Similar Polygons
Holt #1
Holt #2
Holt #3
Pearson #1: Using Similar Figures
Pearson #2: Applying Similar Polygons
7-3 Proving Triangles Similar
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Pearson #1: Finding Lengths in Similar Triangles
Pearson #2: Using Similar Triangles Measure Indirectly
7-4 Similarity in Right Triangles
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: Using Relationships in Similar Right Triangles
7-5 Proportions in Triangles
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: Using the Side-Splitter Theorem
Pearson #2: Using the Triangle-Angle-Bisector Theorem
Ch. 8 - Right Triangles and Trigonometry
8-1 The Pythagorean Theorem and Its Converse
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: The Pythagorean Theorem
Pearson #2: The Converse of The Pythagorean Theorem
8-2 Special Right Triangles
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: 45-45-90 Triangles
Pearson #2: 30-60-90 Triangles
8-3 The Tangent Ratio
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Pearson #1: Using Tangent Ratio to Measure Indirectly
8-4 Sine and Cosine Ratios
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Pearson #1: Sine and Cosine Ratios and their Inverses
8-5 Angles of Elevation and Depression
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: Angles of Elevation
Pearson #2: Angles of Depression
8-6 Vectors
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Pearson #1: Describing Vectors
Pearson #2: Adding Vectors
Pearson #3: Using Vector Sums
Ch. 9 – Transformations
9-1 Translations
Holt #1: Translations in the Coordinate Plane
Holt #2: Writing a Translation Rule
Pearson #1: Writing a Rule to Describe a Translation
Pearson #2: Using Compositions of Translations
9-2 Reflections
Holt #1: Identifying Reflections
Holt #2: Identifying and Drawing Reflections
Holt #3: Identifying and Drawing Reflections Application
Holt #4: Drawing Reflections in the Coordinate Plane
Pearson #1: Using Reflections to Solve Real-World Problems
Pearson #2: Graphing Reflections of a Shape
9-3 Rotations
Holt #1: Identifying Rotations
Holt #2: Drawing Rotations
Holt #3: Drawing Rotations on a Coordinate Plane
Holt #4: Rotations Application
Pearson #1: Finding the Angle of Rotation
Pearson #2: Drawing a Rotation Image
9-4 Symmetry
Holt #1: Lines of Symmetry
Holt #2: Rotational Symmetry
Holt #3: Lines of Symmetry and Angles of Rotation Application
Holt #4: 3-Dimensional Symmetry
Pearson #1: Drawing Lines of Symmetry
9-5 Dilation
Holt #1: Identifying Dilations
Holt #2: Drawing Dilations
Holt #3: Dilation Application
Holt #4: Drawing Dilations on the Coordinate Plane
Pearson #1: Graphing Dilation Images
9-6 Compositions of Reflections
Holt #1: Reflecting over Parallel Lines
Holt #2: Reflecting over Intersecting Lines
Holt #3: Glide Reflections
Pearson #1: Compositions of Reflections Across Parallel Lines
Pearson #2: Compositions of Reflections Across Intersecting Lines
Pearson #3: Finding a Glide Reflection Image
Pearson #4: Classifying Isometries
9-7 Tessellations
Holt #1: Identifying Tessellations
Holt #2: Drawing Tessellations
Holt #3: Identifying Regular and Semi-Regular Tessellations
Holt #4: Determining which Regular Polygons Tessellate
Pearson #1: Determining Figures that will Tessellate
Ch. 10 – Area
10-1 Areas of Parallelograms and Triangles
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: Parallelograms
Pearson #2: Triangles
10-2 Areas of Trapezoids, Rhombuses, and Kites
Holt #1
Holt #2
Holt #3
Pearson #1: Trapezoids
Pearson #2: Kites
Pearson #3: Rhombuses
10-3 Areas of Regular Polygons
Holt #1
Pearson #1: Area of a Regular Polygon
10-4 Perimeters and Areas of Similar Figures
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: Finding Areas using Similar Figures
Pearson #2: Real-World Problems using Similar Figures
Pearson #3: Similarity and Perimeter Ratios
10-5 Trigonometry and Area
Holt #1
Pearson #1: Using Trig to find the Area of Regular Polygons
Pearson #2: Using Trig to find the Area of Triangles
10-6 Circles and Arcs
Holt #1
Holt #2
Holt #3
Pearson #1: Using Circumference with Concentric Circles
Pearson #2: Finding the Length of an Arc
10-7 Areas of Circles and Sectors
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Holt #6
Pearson #1: Area of a Sector of a Circle
Pearson #2: Area of a Segment of a Circle
10-8 Geometric Probability
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: Finding Geometric Probability
Ch. 11 - Surface Area and Volume
11-1 Space Figures and Cross Sections
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Pearson #1: Using Euler's Formula
Pearson #2: Drawing a Cross Section of a Solid
11-2 Surface Areas of Prisms and Cylinders
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Pearson #1: Surface Areas of Prisms
Pearson #2: Surface Areas of Cylinders
11-3 Surface Areas of Pyramids and Cones
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: Surface Areas of Pyramids
Pearson #2: Surface Areas of Cones
11-4 Volumes of Prisms and Cylinders
Holt #1
Holt #2
Holt #3
Holt #4
Holt #5
Pearson #1: Volumes of Prisms
Pearson #2: Volumes of Cylinders
Pearson #3: Volume of a Composite Figure
11-5 Volumes of Pyramids and Cones
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: Volume of Cones
Pearson #2: Volume of Pyramids
11-6 Surface Areas and Volumes of Spheres
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: Surface Areas of Spheres
Pearson #2: Using Volume of Spheres to find Surface Area
Pearson #3: Finding Volumes of Spheres
11-7 Areas and Volumes of Similar Solids
Holt #1
Holt #2
Holt #3
Holt #4
Pearson #1: Identifying Similar Solids and Their Similarity Ratio
Pearson #2: Finding the Surface Area and Volume of Similar Solids
Ch. 12 – Circles
12-1 Tangent Lines
Holt #1: Identifying Tangents, Secants, and Chords
Holt #2: Equations of Tangent Lines from Radii and Points of Tangency
Holt #3: Forming Right Triangles with Radii and Tangents
Holt #4: Congruent Tangents Intersecting Outside a Circle
Pearson #1
Pearson #2
12-2 Chords and Arcs
Holt #1: Central Angles and Intercepted Arcs
Holt #2: The Arc Addition Postulate
Holt #3: Congruent Angles, Arcs, and Chords
Holt #4: Perpendicular Radii and Chords
Pearson #1: Using Radius-Tangent Relationships
Pearson #2
: Using Multiple Tangents
12-3 Inscribed Angles
Holt #1: Inscribed Angles and Intercepted Arcs
Holt #2: Inscribed Angles Intercepting the same Arc
Holt #3: Inscribed Angles Intercepting the same Arc or a Diameter
Holt #4: Quadrilaterals Inscribed in Circles
Pearson #1: Using the Inscribed Angle Theorem
Pearson #2: Using Angles formed by a Tangent and a Chord
12-4 Angle Measures and Segment Lengths
Holt #1: Tangent-Secant and Tangent-Chord Angles
Holt #2: Angle Measures Inside a Circle
Holt #3: Angle Measures Outside a Circle
Holt #4: Angle Measures Outside a Circle Application
Holt #5: Finding Arc Measures
Holt #6: Segment Lengths of Chords Intersecting Inside a Circle
Holt #7: Segment Lengths of Chords Intersecting Inside Application
Holt #8: Segment Lengths of Secants Intersecting Outside a Circle
Holt #9: Segment Lengths of Secants and Tangents Intersecting Outside
Pearson #1
Pearson #2
Pearson #3
12-5 Circles in the Coordinate Plane
Holt #1: Writing Equations using Center and Radius or Center and through-point
Holt #2: Graphing
Holt #3: Writing Equations and Graphing Application
Pearson #1: Finding Angles formed by Chords, Secants, and Tangents
Pearson #2: Applying Angles formed by Chords, Secants, and Tangents
12-6 Locus - A Set of Points
Pearson #1: Drawing and Describing Loci in a Plane
Pearson #2: Drawing a Locus for Two Conditions
Pearson #3: Drawing and Describing Loci in Space
MORE VIDEO TUTORIALS:
THE TEXTBOOK (PEARSON VIDEOS)
ANOTHER TEXTBOOK (HOLT VIDEOS)
KHAN ACADEMY
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